Fan-blower.



A. MATHIS.

FAN BLOWER.

APPLIUATIOH FILED APR. a, 1906.

952,993. Patented Mar. 22, 1910. .mmnu m Wmw I "w" 1% 159? m 1 UNITED STATE PATENT OFFICE.

AUGUST THIS, 0! CHICAGO, ASSIGROB TO HA'IHIS nno'rms 0mm, 01 CHICAGO, ILLINOIS, A OOEPOILTIOH OF INDIANA.

PAH-BLOWER.

lpecflleaflon of Letters Patent.

Patented Mar. 22, 1910.

To all whom it may concern:

Be it known that 1, Austin MATHIB, a citizen of the United States of America, and a resident of Chi in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fan- Blowers, of which the following is a specification.

- This invention relates to fan blowers, and more especially to the exhaust type of such blowers; and has for its object to provide a sim 1e and eflicient structural formation and com ination of parts in the rotary member of a fan whereby a plane and smooth surface is attained on the active face of said member to avoid a serious defect in fan members as usually constructed, to wit: the clogging up of the fan by fibrous material passing through the fan; and which at the same time provides a very strong, durable and economical connection of the component parts of the fan member to each other, all as will hereinafter more fully appear.

In the accompanying drawings :Figure 1 is a transverse section on line :c-a: Fig. 2 of the fan member of a blower havingrthe present invention applied. ig. 2 is a ont elevation of the same. Fig. 3 IS an enlarged detail section, on line M, Fig. 1.

Similar numerals of reference indicate like parts in the diiferent views.-

Referring to the drawings :-1 is the rotary fan member of a blower, adapted to revolve within a fan casing of an usual con-- struction, and preferably of the orm having a single inlet trunk or opening in its front wall. .2 is the carrying hub of said fan.

member, havin the usual concave and cone form shown in ig: 1; such hub, in the resent invention is provided on its concav and conical periphery with a series of pairs of inte 1 formed ribs 3, arranged'm separa re ation to form a series of intermediate recesses for the rece tion of the inner ends of the series of radi y vanes or blades of the fan member, as hereinafter more fully set forth.

4 are the vanes or blades of the fan member, formed of late metal with their inner edges fitted to t e aforesaid recesses between theribs 3;nearsucha edges,the said vanes or blades are formed with a series of orifices 5, ada ted to receive cross studs 6 integral with e ribs 3.

'metalsecuredatitsinneredge In'the t invention the assemblage of the above parts is efiected casting the carrying hub 2, the ribs 3, the studs 6,

um and through the vanes or blades 4, w the latter are properly supported in a mold of suitable construction.

7 is a circular conical annulus of plate to the outerofthehub2inthecastingprocess before described, and so that the metal of the hub will embrace the side of said annulus in manner illustrated in 1 to afiord rigid and substantial connection of the parts.

8 are a series of angle bars forming connections between the annulus 7 and the vanes or blades 4, and riveted to such parts in the usual manner to afford a rigid and substantial attachment of the parts together. In the preferred construction of the present invention, the inner ends of said angle bars 8 are embedded in the metal of the ub 2, as illustrated in Figs. 1 and 3, during the castinfig lpiperation before referred to, so as to a 0 a strong and economical attachment between the parts.

9 is a ring of metal secured to the annulus 7, near its riphery, with a view to impart lateral sti ness thereto.

With the present construction a strong mostedge and durable-attachment of the parts is attained in a ready and economical manner, and at the same time a smooth surface is rovided on the active face of the carryilzg ub 2, with an entire avoidance of the usu projecting belts or rivets heretofore employed to attach the parts together, and upon whleh passing fibrous matenal would catch to clog up the blower and render the same inoperatlve to a ter'or lesser degree. Another feature 0 merit in the present improvement is that all centrifugal stress 18 imposed on the wrought metal outer parts of the fan member, and in consequence can be provided a inst with a maximum amount of stre and a minimum amount of weight 0 the parts.

and a series of plate metal fan blades secured at their inner ends between pairs of said ribs by casting the hub and ribs upon said blades.

2. A rotary fan member comprising, a cast metal hub having a tapering rip cry and provided with a plurality 0 pairs of integrally formed ribs on said peri hery, and a series of cross-studs between eac pair of ribs, and a series of plate metal fan blades formed with a series of orifices for the reception of the studs aforesaid, said blades being secured at their inner ends between pairs of said ribs by casting, the hub, ribs and studs upon said blades.

3. A rotary fan member comprisin a cast metal hub having a tapering rip ery and provided with a pluralit 0 pairs of integrally formed ribs on sai periphery, a conical annulus fo an extension of the hub, and a series of plate metal fan blades secured at their inner ends between airs of said ribs by casting the hub and ii upon said blades and annulus.

4. A fan member for blowers, com rising a concave cone shaped cast metal hub aving airs of integrally formed ribs on its surace in separated relation to form a series of recesses a conical annulus at the outermost edge of the hub, a series of late metal blades, angle bars connectin t e annulus and vanes together, the annu us, blades and angle bars being attached to the hub along their entire inner ends in the manner described.

Signed at Chicago, Illinois, this 7th day of April 1906.

A. MATHIS. Witnesses:

Roena'r Beans, M. H. HOLMES. 

